(Archaic) The act or an instance of showing; an exhibition.
A pompous act, remark, etc.
A specious allegation; a pretext:
Find another word for grandioseness. In this page you can discover 7 synonyms, antonyms, idiomatic expressions, and related words for grandioseness, like: grandiosity, ostentation, pomposity, pompousness, pretension, pretentiousness and plain.